package com.roytrack.dailytest.simplejava.string;

import java.util.regex.Pattern;

/**
 * Created by roytrack on 2015/4/24.
 */
public class CharUtil {

  public static void main(String[] args) {
    String[] strArr = new String[]{"www.micmiu.com", "!@#$%^&*()_+{}[]|\"'?/:;<>,.", "！￥……（）——：；“”‘'《》，。？、", "不要啊", "やめて", "韩佳人", "???"};
    for (String str : strArr) {
      System.out.println("===========> 测试字符串：" + str);
      System.out.println("正则判断结果：" + isChineseByREG(str) + " -- " + isChineseByName(str));
      System.out.println("Unicode判断结果 ：" + isChinese(str));
      System.out.println("详细判断列表：");
      char[] ch = str.toCharArray();
      for (int i = 0; i < ch.length; i++) {
        char c = ch[i];
        System.out.println(c + " --> " + (isChinese(c) ? "是" : "否"));
      }
    }
  }

  // 根据Unicode编码完美的判断中文汉字和符号
  private static boolean isChinese(char c) {
    Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);
    if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS || ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS
            || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B
            || ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS
            || ub == Character.UnicodeBlock.GENERAL_PUNCTUATION) {
      return true;
    }
    return false;
  }

  // 完整的判断中文汉字和符号
  public static boolean isChinese(String strName) {
    char[] ch = strName.toCharArray();
    for (int i = 0; i < ch.length; i++) {
      char c = ch[i];
      if (isChinese(c)) {
        return true;
      }
    }
    return false;
  }

  // 只能判断部分CJK字符（CJK统一汉字）
  public static boolean isChineseByREG(String str) {
    if (str == null) {
      return false;
    }
    Pattern pattern = Pattern.compile("[\\u4E00-\\u9FBF]+");
    return pattern.matcher(str.trim()).find();
  }

  // 只能判断部分CJK字符（CJK统一汉字）
  public static boolean isChineseByName(String str) {
    if (str == null) {
      return false;
    }
    // 大小写不同：\\p 表示包含，\\P 表示不包含
    // \\p{Cn} 的意思为 Unicode 中未被定义字符的编码，\\P{Cn} 就表示 Unicode中已经被定义字符的编码
    String reg = "\\p{InCJK Unified Ideographs}&&\\P{Cn}";
    Pattern pattern = Pattern.compile(reg);
    return pattern.matcher(str.trim()).find();
  }

}
